Major western europe- Halberlders [Good pikemen like infantry, great melee attack], Musketeers[ good shot, but small numbers], Armoured Riders [basically a knight], Dragoons [basically a musketeer on a horse], Hussar[as you know light cavarly], Cuirassier[heavy cavalry]
All European nations- Armed Citizenry [basically bad swordsmen], Pikemen[worse than halberders but ok], Arquebusers[predecessor of musket still in wide use, if you would imagine worse musketeer] Harquebusier[meduim armoured lancer],
Sakers, Demi-Cannons. Demi Lancers[Basically better armoured but a heavy Harquebusier, but much slower, going out of date]
France- Kings Musketeer [mounted rifle unit, not dragoon but excellent shot]
Ruthenia/Crimea/Georgia- Hetman [Their General's bodyguard], Sich Cossack [Very very fast but weak light infantry], Register Cossack[Similar but slower and better equiped than sich] Serdiuk [Really good shot, but cant melee]
Russia-Spearman [much better than any other pike unit], Strelets [quickfire many men but weak health], Vityaz [basically a russian knight/armoured rider], Don Cossack [like register but slower again, more akin to Vityaz]
Austria-Roundshielders [Excellent melee combatants, but bad against cavalry], Croat Riders [like a sich cossack but better attack and health], Austrian Jäger [good musketeer, longer to make, best attack, accuracy]
Poland-lith- Winged Hussar [Best cavalry, Fastest, High attack, terrify enemy], Light Rider[ good health for light cavalry], Baltic Pikeman [more health, less attack than regular] Baltic Musketeer [Best health]
Saxony- Cavalry Guard [Cheaper knight]
Spain- Rodeleros [alright swordsmen with big shields] Conquistadors [only armoured shooters,low routing, cannot melee]
Dutch- Dutch Arquebuser[Fast producing quick moving Arquebuser]
England-
Sweden- Knekt [basically a cheaper knight]